One-piece toothbrush



FIG. 1 is a left, bottom oblique view of a one-piece toothbrush showingmy new design;

FIG. 2 is a right, bottom oblique view thereof;

FIG. 3 is a right elevation view thereof;

FIG. 4 is a left elevation view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a greatly enlarged end view thereof;

FIG. 8 is an enlarged, fragmentary, right, top oblique view thereof;and,

FIG. 9 is an enlarged, fragmentary, left, top oblique view thereof.

CLAIM The ornamental design for a one-piece toothbrush, as shown.